Speed-differentiator.



PATENTED OCT. 23. 1906.

F. H. GHEYNB. SPEED DIPFBRENTIATOR.

AYPLIOATION FILED 4FEB. 17, 1904.

2 SHEETS-SHEET 1.

g'nvembo Frederick H. Cheype By wmudf qvtudamgs PATENTED OCT. 23, 1906.

.F- H. GHEYNE.

SPEED DIPPERENTIATOR. APPLwATIoN FILED FEB. 11. 1904.

2 2 BEEBT8-SHBET 2.

-UNITED sTATns PATENT OFFICE.

-`No. saar-72.

specification bf Letters maar. Application filed February 17, 1904. Serial No. 1.9 LA016i Patented Oct. 23, 1906.

. To all whom, it may concer-rt:

Be it known that I, FREDERICK H. CHEYNE, a citizen of'the United States, residing at Indianapolis, in the county ofMarion and State of Indiana, have invented certain new and useful Improvements in Speed-Differentiators, of which the following is a specification.

The object of my invention is toprovide a compact readily-controllable device by means of which the speed ratio between a driving and a driven part may be readily-yet posi- :tively controlledV without the intervention of separate series of connecting trains of. gears.

The accompanying, drawings illustrate my invention.

Figure 1 is a front elevation of a device embodying my invention; Fig. 2, a transverse I section on line 2 2 of Fig. 3 Fig; 3, an axial j section on line 3 3 of Fig 2 Fig. 4, a front elevation of a 4slightly-modified form provided with an automatic speed-controlled governor, Athe view being taken on a line 44 of Fig. 5. Fig. 5 is an axial section of the parts shown in Fig. 4, and Fig. 6 a'section on line 6 6 of Fig. 2. y

In the drawings, 10 indicates a shaft to which is keyed a gear-11. J ournaled on the shaft adjacent gear 11 is a pulley-12, provided at the end adjacent gear 11 with an overhanging fiange 13, thus forming a chamber 14, the end of which is closed by a suitable plate 15. J ournaled upon suitable pins 16 within the chamber 14 and upon the pulley 12 -are planetary gears 17, which mesh with the gear 11.

within which 'is mounted a piston 19', connected to the adjacent gear 17 by a pitman 20.

In Athedrawings one end 'of leach cylinder 18 is shown open; and` the opposite .end is provided with a discharge orpassage way 21.

Mounted in each passage-way 21v is a valve 22, the stem 23 of which is projected through plate 15 and provided with an operatingarm 24. Each cylinder 18 is also provided with an inlet-port 8, covered by a suitable check-valve 9, Fig. 6. i

I The plate 15 is provided with a central hub 15 of considerably greater internal diameter than shaft l0, and journaled in said hub isa thimble-25, which is both rotatable with the pulley 12 and also angularly adjustable therein. In'order that the chamber 14 may be oil-tight, tliimble 25 is provided at its innen end with a tight packing 25', engaging shaft 10, and the joint between the thimble and Arranged within chamberv 14'adjacelnt each gear 17 is a cylinder 18,'

hub 15 is also packed. lThe thimble 25 is provided with internal spiral threads or with a pin engaging suitable spiral threads formed in a sleeve 26, journaled upon shaft 10 and provided at its outer end with a peripherally-grooved head 26', which may ben engaged by. a suitable shifting yoke.A (Not shown.) In order that' the sleeve 26 and thimble 25 may be positively rotated with the pulley 12,' I secure to plate '15 a -spider 27, to which the sleeve 26 is keyedby a key 27. Pivoted to each valve-arm 24 is one end of a link 28, the opposite end being pivl" oted to the t'himble 25, the arrangement being suchthat by shifting sleeve 26 axially thimble 25 may be adjusted angularly, and thus through the linksv 28 shift the valves 22, so as to regulate the size of the passage-Ways 21. 5 is identical with that already described eX- cept that the thimble 25'.' which corresponds' with the'thimble 25 in Fig. 3, is provided with a single arm 25"', to which is secured one end of' aspring 29, the opposite end of said spring being secured to an inertia gov-- ernor member 30, which is sleeved upon the thimble/25". VThe links 28' (corresponding to links 28 of Fig. 3) are-then pivoted to the of tothe compressibility ofthe oil or other fluid in the V cylinder 18 in front of the iston 19, so that the gears 17 are substantia ly locked against rotation and are thereupon revolved as planetary gears about the shaft 10, carrying the pulley 12 with them, the whole mechanism thus rotating as aunit. lIf a slower speed of the pulley is desired, sleeve 26 is shifted'upon The construction shown in Figs. 4 andv IOO the shaft so' as to rotate thimble 25 inthe del hind. If the passage-ways -21 and the openings through the valve 22 are of suiiicient dimensions to permit free flow of fluid therethrough, the pulley 12 may remain stationary, so that any variation of speed between zero and the maximum. speed of the shaft may be produced.

It will be noticed that' the same operation takes place if the pulley 12 be made the driving element instead of the maximum speed of the driven element taking place when the gears are locked together by reason of the closing of the valves 22.

In the construction shown in Figs. 4 and 5 by v arying the relation ofthe thimble 25 to the inertia element 30 to regulate the tension of spring 29 any desired speed may be automatically maintained., the inertia element shiftin according to the variations ol speed of the riving element to automatically -control the position ofl the valves, and thus determine the ratio of speed.

It will be noticed that the apparatus may 3e used as a clutch having all the desirable qualities of a friction-clutch, yet without resultant-heating. 4

I claim as my invention- 1. In a speed-changing' device, the combigear keyed thereto, a pulnation. of a shaft, a

ley journaled on said shaft, a planetary gear and meshing with the a cylinder' andpiston a connection between one of said last-mentioned' parts and the plancarried by said pulley first-mentionedgear,

etary gear, whereby rotation of said planetary gear would cause relative movement between the cylinder and piston, a liquid-con- I*tainer communicating with saidv cylinder, a valve controlling said communication, and means for holding the valve in desired positions of adjustment. i

driven element, the

In aspeed-changing device, the combination of a shaft, a gear keyed to-said shaft, a pulley journaled on said shaft and provided with a fluid-chamber, a planetary gear carried by said pulley and meshing with the firstmentioned gear Within the fluid-chamber, a cylinder mounted in said fluid-chamber and communicating therewith, a piston mounted in said chamber and connected to the planetary gear, a valve controlling communication between the cylinder and Huid-chamber, and means for controlling the position of said valve and holding same in desired positions of adjustment.

3. In a speed-changing device, the combination of a shaft, a gear keyed to said. shaft, a pulley journaled; on said shaft and provided witha fluid-chamber, a planetary gear carried by said pulley and meshing with the firstmentioned gear within the fluid-chamber, a cylinder mounted in said fluid-chamber, and communicating therewith, a piston mounted in said chamber aid connected to the planetary gear, a valve controlling connnunication between the cylinder' and Huid-chamber, a thimble journaled about said shaft, connections between said thimble and the valve whereby rotation of the thimble will o erate the valve, a sleeve journaled on the sha t, and intermediate connections between said sleeve and thimble wherebyaxial movement of' the sleeve will produce angular movement of theY thimble, for the purpose set forth.

In witness whereof I have .hereunto set my hand and seal, at Indianapolis, Indiana, this 13th day of February, A. D. 1904.

FREDERICK H. GHEYNE. u. 5.] Witnesses: ARTHUR' M. Hoon,

JAMES A. WALSH. 

